How many servings does this recipe make?

This recipe makes 4 servings. You can adjust the portion size directly on this page.

What ingredients do I need for Roast Beef and Caramelized Onion Sliders Recipe?

You need 8 ingredients. The key ingredients include: 1/3 cup Horseradish Mayonnaise, 8 (3-inch) slider buns, sliced in half horizontally and toasted, Kosher salt, Freshly ground black pepper, and more.

Is Roast Beef and Caramelized Onion Sliders Recipe suitable as meat & poultry?

Yes, Roast Beef and Caramelized Onion Sliders Recipe falls under the Meat & Poultry category and is a great choice for this type of meal.

How do I store leftover Roast Beef and Caramelized Onion Sliders Recipe?

Store leftovers in an airtight container in the refrigerator for up to 3–4 days. Reheat gently before serving.

Roast Beef and Caramelized Onion Sliders Recipe

Name: Roast Beef and Caramelized Onion Sliders Recipe
Prep time: 15 min
Cook time: 30 min
Total time: 45 min
Yield: 4 servings
Ingredients: 1/3 cup Horseradish Mayonnaise; 8 (3-inch) slider buns, sliced in half horizontally and toasted; Kosher salt; Freshly ground black pepper; 8 ounces thinly sliced roast beef; 1 cup caramelized onions; 10 cornichons, thinly sliced lengthwise; 2 cups watercress (about 2 ounces), washed and dried

Try this homemade Roast Beef and Caramelized Onion Sliders recipe the whole family will love. Made with Horseradish Mayonnaise, buns, Kosher salt and Fr…

This Roast Beef and Caramelized Onion Sliders relies on simple, everyday ingredients such as horseradish mayonnaise, kosher salt, freshly ground black pepper and thinly sliced roast beef. It comes together quickly and makes 4 servings, at about 517 kcal each. The step-by-step instructions below are written to be easy to follow, even on a busy day.

It's versatile enough for an easy weeknight dinner yet satisfying enough for guests at the weekend. Serve it with your favorite sides, and keep any leftovers for a quick meal the next day.

Updated Jun 30, 2026

Serves 4 Meat & Poultry

Servings: persons

1/3 cup Horseradish Mayonnaise
8 (3-inch) slider buns, sliced in half horizontally and toasted
Kosher salt
Freshly ground black pepper
8 ounces thinly sliced roast beef
1 cup caramelized onions
10 cornichons, thinly sliced lengthwise
2 cups watercress (about 2 ounces), washed and dried

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Quick Info

Servings
4 servings
Calories
517 kcal
Category
Meat & Poultry

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Roast Beef and Caramelized Onion Sliders Recipe

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